Lock



Feb. 24, 1931. R L BENSON 1,794,055

LOCK

Filed Jan. 3, 1930 2 Sheets-Sheet l gh ig. 1. 5.9 Z

La e //l/a 'Ao V- A JK fa//// Petenteel Feb. 24,` 1931 UNITED STATES `ROSS L. BENSON, OF LAKE VILLA, ILLINOIS LOCK Application led January 3, 1930. Serial No. 418,276.

. structed that it may be applied by mounting in spaced 'holes bored in the edge of the door;

l to provide a mortise loclr which requires but the removal of a minimum of the material of the door for its reception; to provide a lock that is susceptible of being fastened to the door between the latch bar and locking bolt; to provide a device of this character which is adjustable to adapt it to either right or left hand mounting; to provide a lock formed with means for accurately spotting the points on the door where theboring is to be done for mounting; and to provide a construction which is of simple form and susceptible `of cheap, manufacture and low marketing cost.

Vith this object in view, the invention consists in a construction and combination of parts in which a preferred embodiment is` illustrated in the 'accompanying drawings wherein Figure 1 is a front elevational view of the invention.

Figure 2 is a sectional view lon the plane indicated by the line 2 2 of Figure '1.

Figure 3 is a side elevational view of the invention.

Figure 4e is a top plan view of the locking bolt.

Figure 5 is a bottom ing bolt.

Figure 6 is a top plan view of the latehing bar.

Figure 7 is a sectional view on the plane indicated by the line 7-7 of Figure l.

Figures 8 and 9 are views similar to Figure 7 but showing the latching bar formed for plan view of the lochn use with dilllerent keys than that in Figure 7.

Figure 10 is a detail sectional view of the rear end of the locking bolt, showing the initial movement of the key in raising the tumbler preparatory to shitting the bolt.

The locking' bolt 10 and latch bar 11 are respectively housed in the tubular guide members 12 and 13 of which the latter is mounted upon and extends rearwardly from the face plate 15 and the latter is adjustably mounted on a thimble 16 carried by and eirtending rearwardly from the face plate. In

mounting, the tubular guide members are inserted in holes bored in the edge of the door and the face plate set down flush with the edge. Since the tubular members are spaced apart, the material of the door lying` between the bored holes constitutes a web to which the face plate may be secured as by a fastening screw passing through the center hole 17, similar screws passing through the upper and lower holes 18. Thus the construction provides for additional astenings over the conventional mortise lock, such additional fastenings engaging the web of material intervening between the latch bar and locking bolt.

The tubular guide lll telescopes the thimble 16 and is secured to the latter with a set screw 19 engaging a counter-sink 20 in the thimble. The set screw is threadingly engaged with the tubular guide 111 and the lat ter ata diametrically opposite point has a threaded hole 21 with which the set screw may be engaged when the guide member is rotated 180 to reverse the position of the` latch bar. Thus the guide member may be mounted to properly dispose the latch bar for mounting either on right handedly or left handedly swinging doors.

The latch bar 11 snugly but slidingly lits the guide tube 13 and is reduced as indicated at 22 to have a `correspending iit in the thimble 16, the shoulder 23 thus `formed almtting the end of the thimble and limiting the distance to which the latch bar projects through the face plate. The latch bar retractable against the pressure of a spring 2l which is housed in a slot formed in the latch bar,` lthis spring bearing at one end against the end of the slot and at the other end against the transversely disposedscrew 9.6 extending diametrically through the guide tube and transversely thrmigh the slot Q5. The screw 26, aside 'from providing an abutment for the spring 21.1-, also serves to prevent angular or turning movement of the latching bar and thus insures the proper position ot the nose end of the latter.

Behind the slot .25` the latchingbar is formed with a larger slot 26 which serves as a clearance space for the cam 27, the latter bolt is retracted.

having a cross sectionally angular eye through which the knob spindle 28 passes. rllhe cam 27 is formed With a peripheral lug 29 which, when thecam is turned by reason of turning the spindle 28, enters one of the slot-s 30 or 3l, these slots being formed in the' latching bolt respectively from the top and bottom and communicatingwith the enlarged slot 26. Vhether the lug' 29 enters the slot 30 or slot-S31 depends on the direction in which the spindle 28 is turned. Either Way, it engages one end of the slot and retracts Vthe latching bolt against the pressure of the spring 24, since the cam is provided with a bearing formed in the end of the tubular guide 13.

The locking bolt Which is slidingly mounted in the tubular guide 12 is cut away on the under sideradjacent the rear end to provide a clearance space 33 for the Ward 34 of the key 35. The web portion 36 just above the clearance space 33 is formed with a series of slots 37 defined by transverse Webs 38 and longitudinal web 39. This construction is employed Where dual tumblers are used, but

`if a single tumbler is used, the longitudinal Web is omitted and if more than tvvo tumblers, an additional longitudinal web is employed.l In the dual tumbler form illustrated, the tumblers each consist of a pair of spaced lugs 40 and 41 carried at the extremity of a leaf spring 42, the two springs 42 being anchored si e by side on the inner surface' of the top Wall of the tubular guide 12 and at intermediate point in the length at the latter. The slots 37 are in'series of three each and the tumblers, consisting of double lugs 40 and 41, enter the intermediate and one end slot When the bolt 10 is extended and the intermediate and the other end slot When the The Webs 38 on their upper edges are beveled as indicated at 43 to facilitate the entrance of the lugs of the tumblers into the slots.

The tubular guide in the region of the clearance space 33 is formed With openings 44 for the entrance of the key and When the latter is turned the Wardenters the slots 37 from the bottom, raising the tumblers against the pressure of the springs 42 until the lugs are clear of the Webs 38. But the Ward of the key is then in the intermediate slots 37 andy the continued turning of the key causes the Ward to bear on one of the Webs 38 and vthus actuate the bolt, either extending or retracting it, depending on its original position and serted key. f

locking bolt 10 are each provided on its rear end With a centrally disposed spur 45 by means of which a prick punch mark may be made in the material of the door.

1n order to limit the actuation of the locking bolt to a particular key, the bolt is formed on the under side Vand on opposite sides of the slots 37 with longitudinal ribs 34a and the key has its Ward formed With slots to clear these ribs. The ribs may be diiferently positioned as at 346 in Figure 8 and as at 340 in Figure 9, the Wards of the keys applicable to these forms of .bolts being slotted at points corresponding tothe positioning of the ribs. Y

The invention having been described, what is claimed as nev.T and useful is:

1. A lock having a face plate and a tubular guide member extending rearwardly therefrom, a bolt slidinglymounted in said guide member and provided With series of slots, a tumbler having lugs engagable in said slots, and a fiat spring secured at one end to the tubular guide and carrying said tumbler at its other end, the tumbler being releasable Vand the bolt actuable by the Ward of an in- 2. A lock comprising a face plate having rearwardly extending tubular guidel members, locking and latching bars slidingly mounted in said guide members and provided on their rear ends with spurs disposedon the longitudinal axes of the guide members.

In testimony.l whereof he alitixes his signature. Y l n ROSS L. BENSON. 

